In a bowl, mix all the ingredients (except the oil) until well combined and shape into walnut-size balls.
In a wide cast iron or non-stick pan, heat about ½ cm oil to cover the bottom of the pan. Fry the meatballs on medium heat, a few at a time (taking care not to overcrowd the pan), for 8-10 mins turning them often to brown them evenly.
To bake them, preheat the oven to 230°C, line a baking sheet with parchment, place the meatballs a couple of cms apart from each other, brush each with olive oil and bake for 10-12 minutes till golden and cooked.